Custom 4131 movement – features original‑spec engraved bridges, a non‑indexed weighted‑screw balance for stable and accurate timekeeping. The rotor is CNC‑engraved with clear textures and a fine finish. Compatible with new model Daytona cases and can be paired with a CNC case made to original factory data. Ideal for those who seek high performance and detailed authenticity in their 4131 movement build.
